EP 1165210 A1 20020102 - CATALYTIC TRAP AND METHODS OF MAKING AND USING THE SAME
Title (en)
CATALYTIC TRAP AND METHODS OF MAKING AND USING THE SAME
Title (de)
KATALYTISCHE FALLE UND VERFAHREN ZU SEINER HERSTELLUNG UND ZU SEINER VERWENDUNG
Title (fr)
PIEGE CATALYTIQUE ET SES PROCEDES DE FABRICATION ET SON UTILISATION
Publication
Application
Priority
- US 0008758 W 20000330
- US 12748999 P 19990402
- US 32365899 A 19990601
Abstract (en)
[origin: WO0059611A1] A catalytic trap (10) for the treatment of exhaust generated by lean-burn or partial lean-burn engines is resistant to deactivation by high temperature, lean operating conditions aging. The catalytic trap (10 or 10') comprises a carrier member (12 or 12/12') on which is coated a catalytic trap material (20), optionally in discrete layers (20a, 20b) comprising a NOx sorbent and a refractory metal oxide support on which is dispersed a palladium catalytic component in an amount of at least 25 g/ft<3> Pd up to about 300 g/ft<3> Pd. A platinum and/or a rhodium catalytic component may also be present. The NOx sorbent may be one or more basic oxygenated compounds of an alkali metal and/or an alkaline earth metal, e.g., of cesium and/or barium. A method of making includes applying the NOx sorbent by a post-dipping technique. A method of use includes alternating lean and stoichiometric or rich periods of operation and optionally oxidizing hydrocarbons in the exhaust prior to contacting the exhaust with the catalytic trap (10).
IPC 1-7
IPC 8 full level
B01D 53/94 (2006.01); B01J 23/58 (2006.01); B01J 35/04 (2006.01); B01J 37/02 (2006.01); F01N 3/08 (2006.01); F01N 3/10 (2006.01); F01N 3/28 (2006.01); F02D 41/04 (2006.01); F01N 3/20 (2006.01)
CPC (source: EP KR US)
B01D 53/94 (2013.01 - KR); B01D 53/9422 (2013.01 - EP US); B01J 23/58 (2013.01 - EP US); B01J 37/0244 (2013.01 - EP US); F01N 3/0814 (2013.01 - EP US); F01N 3/0842 (2013.01 - EP US); F01N 3/0871 (2013.01 - EP US); B01D 2255/1021 (2013.01 - EP US); B01D 2255/1023 (2013.01 - EP US); B01D 2255/1025 (2013.01 - EP US); B01D 2255/2022 (2013.01 - EP US); B01D 2255/2027 (2013.01 - EP US); B01D 2255/2042 (2013.01 - EP US); B01D 2255/2063 (2013.01 - EP US); B01D 2255/9022 (2013.01 - EP US); B01J 37/0242 (2013.01 - EP US); B01J 37/0248 (2013.01 - EP US); F01N 2610/03 (2013.01 - EP US)
Citation (search report)
See references of WO 0059611A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 0059611 A1 20001012; AU 4063400 A 20001023; EP 1165210 A1 20020102; JP 2002540916 A 20021203; KR 20010109343 A 20011208; US 2002048542 A1 20020425
DOCDB simple family (application)
US 0008758 W 20000330; AU 4063400 A 20000330; EP 00920033 A 20000330; JP 2000609167 A 20000330; KR 20017012677 A 20011004; US 32365899 A 19990601